Muffler.



C. G. HAWLEY 65B. BAKER.

A MUPPLER.

` APPLICATION FILED DBO.21, 1908. 972,190.

UNITED sTATEs PATENT oEETcE."

OHARLES GILBRT HAWLEY AND ERLE K. BAKER, OF CHICAGO, ILLINOIS.

To all whom 'it may concern:

Beit known that WeCHARLEs G. HAWLEY and ERLE K. BAKER, citizens of the United States, and residents of/ Chicago, Cook county, Illinois, have invented certain new and useful Improvements in Mutliers, of Which'the following is full, clear, and exact description, such as Will enableothers .skilled in the art'to make and use the same.

Our invention relates to improvements in muiiiers for engines, particularly as engines and has special reference to mu ers for use on automobiles.

The object of our invention is to provide means for attachment to the exhaust pipe of an explosion engine or the like and adapted to eifectually muliie or silence the noise of the explosions and the escaping exhaust gases.

A further object of our .invention is to provide simple and effective means for relieving the pressureof gas in the muli-ler pipe vadjacent to the muffler.

Still another object of the invention is t provide means for diverting exhaust gases from the muffler, at will, for use in operating a signal such as a Whistle or horn.

' Specific object of our invention is to providel a combined mufler, mutlier cut-out and signalmeans, which shall be of low cost, of neatappearance and compact form and which shall beboth efficient and durable.

Our invention consists generally in a muftier and muffler parts of the 4construction and combination of parts hereinafter fully described and particularly pointed out in the appended claims.

The invention Will be more readily understood lby reference to the accompanying drawings forming a part of this specification, and in ivhich- Figure 1 illustrates a complete mufHer enibodying our invention; Fig. 2 is an end view thereof; Fig. 3 is a. longitudinal section on the line X-Xof Fig. 2; lFig. 4 is a' transverse section on the line Y-Y of Fig.' v3;

Fig. 5 is an enlarged detail showing the manner inv which the valves are loosely attached to their operating members; and Fig.

6 is a longitudinal section on the line Z'-Z.

ofF ig. 3 viewed in .the direction of the arrows. i

The' invention inthe preferred form illustrate'd in the drawings may be briefly described as comprising a body portion, drum or shell together with heads at opposite ends MUFFLER.

r Specification of Letters Patent. Patented Oct. 11, 1910.v .Application filed December 21, 1908. Serial No. 468,507. l

thereof, one of said heads preferably carrying both a muliier. cut-out and safety valve and a signal valve. As Will be better understood from what follows, the several features of our invention may be embodied in diferent forms than those herein shown, and furthermore certain o f the parts and features are adapted for use with coacting members of forms not herein shown. sons We do not confine or limit our invention to` the specific construction or the complete assemblageof parts herein shown and de- 1 scribed.

Referring now to the drawings, 2 represents 70 a shell or body of the muiiier, 3 the forward end or head thereof, 4 the rear end or head and 5, 5 are rods or boltswvhich bind the heads upon the shell, 3a isa gas inlet box or chamber integral with the head 3 and prefer- 75 ably centrally disposed thereon in alinement with the axis of the shell 2. rlhe main portion of the box 3a is preferably rectangular in cross section as shown in Figs. 2 and 41:;

its forward end 3b is l preferably reduced to 80 circular forni and contains a circular open-V ing 3 to receive the rear end of the exhaust or mutlier pipe from the engine. Thebox 3a has an outlet port, passage or opening 3d tened in the disk 'and is loosely attached to 95 the operating arm or part (see Fig. 5). The valve is normally held shut by `a strong spring 7 attached to the other arm of the bell crank or lever and extending back to a -clip 7 on the shell 2. The valve operating 100 means preferably comprises a pull cord 6 attached to the outer or free end of the bell crank. It will be noted that oneside of the box is preferably yslightly off set to give room for the member 8, it being desirable that said 105' member 8, When in normal position, shall be entirely removed from the direct path of the gases entering at the opening 3C. The member 8 is rigidly attached to the rocking shaft `or stem 8 which extends through the box 110 and has its outer end S formed into an operating crank. A strong spring 9 attached For these .rea-

A valve arm or to the arm 8" and to the shell 2 by a clip 9, l.

serves to normally hold the rocking shaft -or crank and the `member 8 inthe position lines in the several figures of thel drawing. A, pull cord7 orzthe like, 10 attached to the free end of the crank or op-v erating 4lever S is used for turning the crank and hence the member 8 .to the positionA shown by dotted lines (see 3). lVhen the memberS- is in this position it forms an obstination or closure across and within the box i3 and diverte thegases into the signal passage about to be described.' Said passage is' constituted A,by a threaded nipple 11 which is screwed into alhole provided therefor in the side of the box. The end of the nipple projects inward beyond the inner Wall of the box and is machine finislied to'foi'm a valve seat 11 adjacent to the outer side of the member'or delecting WingV S. The wing or gas intercepting member may seat directly upon the end of the nipple, but We preferably employ a disk valve 8 like unto the valve 6 and attached to the Wing S-by a similar loose rivet or stud 8,of the construction shown in Fig. 5. Obviously thexspring 9, Which acts on the shaft 8 and member S, normally holds the self seating disk firmly against its seat on the end of the nipple 11.' The threaded outer end of the nipple 11 serves as ay convenient means ot' attaching a horn, whistle or other gas operated signal to the muiiier and an adequate supply of gas for the signal is available when the member 8 is moved away Ifrom the valve seat and across'the main gas passage to temporarily put the muffler chamber out of service by diverting the gases into the port or passage '11. We prefer that the muffier lcut-out port 3d shall be back ofthe member S rather than opposite the end of said member and as the member'8 is adaptedmto contact the opposite side of the box and is of substantially `the same width as the box (see Figs. 4 and), practically the entire stream of gasv Will be diverted to the signal When the signal valve is opened. It Will be understood that the seatior the valve 8 may be formed on the inner Wall of the box 3a as that portion may be readily reached With a tool inserted through the port 3d, but for reasons of compactness and light Weight We prefer to use the seat-forming nipple'll. The head 4 on the rear end of the shell may contain a series of perforations, according to present practicev in some quarters, but we prefer to provide it with a central boss 4 to receive the outlet or terminal pipe or tube 4". Circular ribs 12 may be vprovided on the inner surface of. the heads 3 and 4 to receive internal cylinders, when such are desired.

From the foregoing, it Will be clear that We have in our invention obtained the several objects set forth in the opening of the specivice.

ication; our invention in its complete pre1 ferred form being the only device that need be attached to av muffler or exhaust pipe to accomplish the stated purposes efficiently and at loW cost.

Having thus described our invention` We Aclaim as new and desire to secure by Letters Patent:

1. In al muiiier .head the combination with a central passage, of side .ports for said head, valve means for closing one of said ports and means common toA said central passage and said other'port Vfor closing one and opening the other.

2. In a mutlier the combination With an.ex

haust chamber and a head therefor having three gas discharge outlets, one of said outlets leading to saidexhaust chamber, another of said outlets leading to the atmosphere and another of said outlets being adapted for connection to a signaling device, valve means for closing said second mentioned outletand separate valve means commento said irst and last mentionedoutlets `for closingy one and opening the other.

3. In a valve for gas engine exhaust pipes,

the combination With an inlet box having 'a central passage for exhaust gases and two outlets, of -valve means for controlling the passage of gases through one of .said outlets and separate valve means common to said central passage and said other outletl for -opening one and closing the other.

4. In a muffler the combination With an exhaust chamber, of a head of said chamber, an inlet box for said head adapted to discharge gases directly into said exhaust chamber, a signaling device associated With said head, valve means for intercepting the gases in said inlet box and for diverting them into said signaling device, a discharge opening for said inlet box adapted to discharge gases directly into the atmosphere, and valve means for closing said opening.

-5. The combination with a muffler of a head for said muffler, a chamber in said head leading directly to said muiiier, a side port/for said head adapted to discharge gases from said chamber into the atmosphere, another port for said chamber and a signaling devicel associated therewith, and means associated with said port for diverting gases from said chamber int-o said signaling de- 6. In a muiiler for gas. engines the combination with an exhaust chamber, of a head for such`chamber comprising, an inlet box and ports leading from said box, one of said ports being adapted to discharge gases directly into the atmosphere and the other of said ports being adapted to discharge gases into a signaling device, a signaling device associated with said last mentioned port and means in said inlet box for obstructing the passage of gases into said muiiier and for diverting them into the port leading to said signaling device.

7 The improvements herein described, comprising a mulller'front end head having an inlet box for attachment to a muliler pipe vand provided with outlet ports or passages valve attached to said stem and adapted to swing across and obstruct the passage in said box, said valve adapted to close on saidv inner seat, a valve adapted to close upon the seat at the outer end of the other port, a spring normally closing the same and means for operating the last mentioned valve, substani.. tially as described.

- 8. The improvementsl herein described, comprising a signal valve for attachment-to. a muffler pipe containing a' passage'rwhich is a continuation thereof and provided/.with a port in its side, a valveseat being :formed at the inner end of saidport, -in combination with a valve stem at the exit end of said passage' adjacent to the wall containing said port, an intercepting valve'- or Wing on said stem' normally parallel with saidseat, but adaptedto be projected across said passage, a stud-projecting from said wing and a'flat disk loosely attached to the wing by said stud and adapted to close upon said seat, substantially as described.

9. The improvements herein described,

comprising a mulller front end head, in coms bination with 'an inwardly openin signal valve and an outwardly openingmu er cutout thereon, a rear head, a shell or drum, and means binding said heads upon said drum, substantially as described.

10. The improvements herein. described, comprising a mulller -front end head, in combination with an inwardly opening signal valve and an outwardly opening muhler cutout thereon, a rear head, a shell or drum, .means binding saidheads upon said drum,

valve operating levers onsaid front head and springs respectively connecting them with the sides of said shell, substantially as described.

11. In a mufller the combination with an exhaust chamber, ofa head for said chamber, a chamber in said head adapted4 to normally discharge gases into said exhaust chamber, asignaling device, a port in said head leading tosaid signaling device, valve means in said head chamberlfor intercepting the passage of gases to said exhaust chamber and for directing said gases into said signaling device, a second port in said head opening directly into the atmosphere and -separate means for closing said port.

In testimony whereof, we have hereunto setJ our hands this 19th day of December,

nesses. v v

` CHARLES GILBERT HAWLEY.

ERLE K. BAKER. -Witnesses: e

Ross E. AIKEN, vJOHN R. LEFEVRE.

1908, in the presenceof the subscribing wity 

